As President Obama considers executive amnesty for millions of illegal immigrants, a lifelong liberal Democrat who protested the Vietnam War and works in the entertainment industry sent the commander-in-chief a gut-wrenching letter recounting the tragic death of his 25-year-old son, killed in a traffic accident by an unlicensed illegal alien.

Since his son’s 2010 death Donald Rosenberg has embarked on a crusade—and launched a nonprofit—to tackle an epidemic of fatalities caused by unlicensed drivers nationwide. Upon researching statistics, the politically liberal Hollywood executive who lives in southern California, found that most fatal highway accidents involve illegal immigrants like in his son’s case. In fact, the year his son was killed, thousands of others also died in traffic accidents involving illegal aliens.

Drew Rosenberg was in law school a few hundred miles away in San Francisco, a renowned illegal immigrant sanctuary that offers pubic services and official government identification cards to the undocumented. He was riding his motorcycle home from class when Roberto Galo, in the U.S. illegally since 1999, made a left hand turn and hit Drew. In an effort to flee, Galo accelerated and drove over Drew’s body three times, according to official reports obtained by his dad.

Five months earlier, San Francisco police stopped Galo, a native of Honduras, for driving the wrong way on a one-way street and driving without a license. He got cited for the traffic violation, driving without a license and having no insurance. The city even impounded the illegal alien’s car, the same one that would later kill Drew. A friend, presumably in the U.S. legally, retrieved the car and Galo drove regularly until the day he struck Drew, according to news reports.

The illegal alien served only 43 days in jail and the Obama administration won’t deport him because driving without a license is a minor offense and U.S. Citizenship and Immigration Services (USCIS) told Rosenberg that constituted one crime of moral turpitude. “I guess that does sound better than ‘he only killed one person,’” Rosenberg tells the president in his letter. Over 7,200 people are killed every year by unlicensed drivers, second only to drunk drivers, the grieving father tells the commander-in-chief in his letter.

The senior Rosenberg is challenging Obama to visit his son’s grave before taking executive action to halt deporting millions of illegal immigrants. “My son and all of the others are considered collateral damage in the quest for votes and campaign contributions,” he wrote. “Illegal immigration is not a victimless crime.” Rosenberg lists a number of grueling examples of innocent people, including a pregnant woman, killed by illegal immigrants around the nation in traffic accidents.